We had artificial grass put down because we have two dogs and visitors with their dogs. It is great. Solid poo can be picked up easily and upset tummy results can be picked up as best you can and then blasted with a hose. Pee no problem, the drainage is excellent. Rinse as required.
Best thing we ever did for the garden.
How big are the dogs? Mine are big and like to scrape with their back feet after "going" When i looked into it, none of the firms would guarantee that this wouldn't damage the grass.
here's my answer from last years thread below
I looked into it for my fair sized lawn, not rolling acres mows in about 20 minutes. I would have kept the grass in the tortoise enclosure and kept the flowerbed and the tiny wooded area (5 trees and about eight shrubs) I wasn't convinced that it would have stood up to my mad dogs' need to dig and it would have been an expensive experiment so i decided not. The fake grass is now in a water permeable backing so properly laid it should drain as well as the land beneath it. I have seen some samples of the good stuff and its very good. The other thing that put me off with the dogs is that the stuff we looked at was pinned to the ground with long u shaped wires and I wasn't convinced that there would stay pit and looked dangerous if pulled out.